Two men with coronary heart disease experienced cardiac arrests during a recent exercise rehabilitation session. Fifteen cases of ventricular fibrillation have occurred in this program since 1968, making an average of one per six-thousand man hours of supervised exercise training. All were successfully resuscitated with no sequelae. Analysis of the patients who experience ventricular fibrillati...

Isometric exercise has been shown to increase metaboliasm in muscle. By contracting agonsit / antagonist muscle pairs, appreciable muscle activity can be achieved. An advanatge of isometric exercise is that no exercise equipment is needed; people can exercise at home on their own. In the present investigation 16 subjects were examined during an isometric co contraction exercise video compared t...

The purpose of this study was to investigate left-ventricular function during strenuous exercise with the self-contained breathing apparatus (SCBA). With the use of two-dimensional echocardiography, images of the left ventricle (LV) were acquired during sustained exercise (3 x 10 min) under two conditions: 1) SCBA, or 2) low resistance breathing valve. Twenty healthy men volunteered for the stu...

Rowing-whether on the water or with machines-is increasingly popular, and, as with any strenuous exercise, the potential for injury is high. Rowers may have common symptoms, such as low-back and knee pain, or more sport-specific problems such as rib stress fractures, nerve impingement, and blisters. Virtually all rowing injuries are due to overuse, and many can be traced to training errors or e...

Grounded in social facilitation theory, this study compared the impact on exercise intensity of a virtual versus a live competitor, when riding a virtual reality-enhanced stationary bike ("cybercycle"). It was hypothesized that competitiveness would moderate effects. Twenty-three female college students were exposed to three conditions on a cybercycle: solo training, virtual competitor, and liv...

An ergometer, to be used for resistance training in space, has been developed and validated. It is designed to activate the extensor muscles of the knee and ankle joints while performing the leg press exercise. Resistance is provided independent of gravity by using the inertial focus of a flywheel. Eleven men performed two series of consecutive maximal voluntary concentric and eccentric muscle ...

Six subjects between the ages of 18 and 30 years old were examined to compare use of the quadriceps, hamstring, gluteus maximus, hip abductor, hip adductor, abdominal, gastrocnemius and paraspinal muscles as assessed by electromyogram (EMG). Muscle use was measured during all forms of exercise and exercise using conventional weight lifting equipment was compared to exercise during Pilates with ...